Oh, and related to chainring bolts: can't tension some of the bolts properly, because they are slipping? Clean with a degreaser or with alcohol the affected surfaces to remove any trace of grease or oil. Often that's all you need to do, but if it's not enough, apply a little bit of acetate glue - actually, I found that any paper glue will work fine, including wheat starch glue (if you can even find such anymore (I'm passionate about antique book conservation, so I have my sources...)). Wait till it dries a bit before tightening the chainring bolt.
NOTE: You apply the glue to the surfaces of the bolts that face the chainring, not the threads.
Last edited by wroomwroomoops; 09-10-07 at 07:40 AM.